In the search of Physics beyond the Standard Model (SM), disagreement between measurements and theoretical expectations, that is “anomalies”, can play the role of beacons to guide our explorations. One longstanding anomaly concerns the anomalous magnetic moment of the muon \(a_\mu =\frac{g_\mu -2}{2}\) . The Muon g-2 experiment at Brookhaven [1]} and its successor at Fermilab [2]}, [3]} have produced the following result
\(\delta a_\mu ^{\rm Exp}=a_\mu ^{\rm Exp}-a_\mu ^{\rm SM}=(2.5\pm 0.6)\times 10^{-9}\,.\) 
